Caster



(No Model.)

W. KOGH.

CASTER.

. Patented Feb. 24, 1885.

FIG-.2-

ilnirnn STATES PATENT @rrrcn.

\VILLIAM KOCH, OF LA'WRENGEBURG, INDIANA.

CASTER.

SPECIFICATION forming part of Letters Patent No. 312,733, dated February2 1, 1885.

Application filed November 24, 1884. (X0 model.)

T0 at whom it may concern.-

Be it known that 1, WILLIAM KOCH, a citizen of the United States,residing at Lawrenceburg, in the county of Dearborn and State ofIndiana, have invented certain new and useful Improvements in FurnitureCasters, of which the following is a specification, reference being hadtherein to the accompanying drawings.

The object of this invention is to improve the peculiar construction offurniture-caster seen in Letters Patent No. 300,782, granted to me June24, 1884, in which patent the yielding tire or rim is represented asbeing provided with ribs or flanges that engage with 1011- gitudinalslots of the wheel or roller, and thus prevent circumferential shiftingof said tire; but practical experience has demonstrated that the devicecan be manufactured more rapidly and its appearance enhanced by omittingsaid ribs and slots and employing other methods of preventing thiscircumferential movement of the rim. I accordingly make use of thecircumferentially-grooved roller seen in said patent, and provide saidroller with a series of inter nal countersinks, pits, recesses, orpockets, or equivalent retaining devices, which are so arranged as toanchor the rim in place and yet be completely concealed from sight, ashereinafter more fully described, and pointed outin the claim.

' In the annexed drawings, Figure 1 is an axial section of the preferredform of my improved caster, wheel, or roller. Fig. 2 is a transversesection thereof. Fig. 3 is an axial section showing the elastic tire orrim applied to said wheel. Fig. 4. is an axial section of another formof the wheel. Fig. 5 is a transverse section of the same. Fig. 6 is afront elevation of another modification of the wheel. Fig. 7 is atransverse section of the same.

As seen in Fig. 1, the roller, wheel, or caster A is essentially thesame as represented in the patent previously referred to, said wheelbeing made of any desired size and material, and being groovedcircumferentially at B, and provided with an axialbore, C, which latteris adapted to receive the pin wherewith said wheel is journaled in acustomary frame. This groove may be of any appropriate size and shape,and is provided on its opposite faces I ter seen in my old patent.

with a series of countersinks, pits, recesses, or pockets, D, of anyform that will best answer the purpose for which they are designed.Furthermore, a greater or less number of these pits may be employed,according to the size of the caster or the special use to which it is tobe put.

E represents the elastic rim, tire, or band, which is preferablymade ofvulcanized india- 6o rubber, and has an inwardly-projecting tongue,

F, adapted to fit snugly within the circumferential groove B, as seen inFig. 3. Projecting outwardly from the opposite sides of this tongue areteats, lugs, or other suitable pro- 6 tuberances, G, that engage withthe pits or pockets D, and thereby prevent the elastic tire or rim Eshifting around the periphery of roller A,while the groove B and tongueF secure said tire against lateral movement.

The above is a description of a cheap, simple, and effectiveconstruction of the caster; but the invention may be modified, as seeninFig. 4, where the circumferential groove B is wider at top than atbottom, and is provided on its opposite faces witha series of V-shapedcoves, H, into which coves the tire is adapted to anchor. Furthermore,the bottom of this groove is made square, as seen in Fig. 5, so as toafford avery secure hold on the rubber tire.

Another modification of my invention is seen in Fig. 6, where the sidesof the groove B are armed with a series of short pins or spurs, I. Thesepins or spurs may project alternately from the opposite sides of saidgroove, or they may extend completely across the same, as indicated atl. The portion of metal at the bottom of this groove is cruciform intransverse section. as seenin Fig. 7. From this description it isevident that either of the devices D, H, I, or 1 will serve equally wellto prevent the flexible rim or tire shift-ing around the periphery ofthe, wheel,and,as all of these devices are concealed when said rim isfitted in its proper place, the caster presents aneater and 5 morefinished appearance than does the eas- In some cases the rim or tire maybe a separate member capable of ,bein g sprung into the circumferentialgroove B; but when the construction seen in Fig. 6 is/ adopted, saidtire must be cast around the wheel or roller. Finally, the sides of thewheel may be convex or bulging, as seen in Fig. 4, so as to facilitatepolishing the same in case it should be nickled or otherwise plated.

I claim as my invention 5 In a furniture-easter, the wheel or roller A,

having a circumferential groove, B, and a series of concealed retainingdevices, D, or their described equivalents located therein, incombination with the elastic tire or riin E, the lat- 10 ter beingprovided with an inwardly-projecting tongue, F, that enters said grooveand engages with said retaining devices, in the manner herein described,and for the purpose explained.

In testimony whereof I affix my signature in I5 presence of twowitnesses.

\VILLIAM KOCH.

, Witnesses:

FRANK Mason,

CHARLES F. Ross.

